import {HTTP} from "../utils/http.js"
class ClassicModel extends HTTP{
  getLatest(sCallback){
    this.request({
      url:"classic/latest",
      success:(res)=>{
        sCallback(res);
        this._setLatestIndex(res.index)
        let key = this._getKey(res.index)
        wx.setStorageSync(key, res)
      }
    })
  }
  getClassic(index,leftOrRight,sCallback){
    let key = leftOrRight=="next"?this._getKey(index+1):this._getKey(index-1)
    let classic = wx.getStorageSync(key)
    if(!classic){
      this.request({
        url:`classic/${index}/${leftOrRight}`,
        success:(res)=>{
          wx.setStorageSync(this._getKey(res.index),res)
          sCallback(res);
        }
      })
    }else{
      sCallback(classic)
    }
  }
  
  isFirst(index){
    return index==1?true:false
  }

  isLatest(index){
    // let latestIndex = this._getLatestIndex
    // return latestIndex==index?true:false
    return index == 8?true:false
  }

  _setLatestIndex(index){
    wx.setStorageSync('latest', index)
  }
  _getLatestIndex(){
    let index = wx.getStorageSync('latest')
    return index
  }
  _getKey(index){
    let key = "classic-" + index
    return key
  }
} 
export {ClassicModel}